Shaanxi JMIJ type diaphragm coupling

The JMIJ type diaphragm coupling is a high-performance metal elastic element coupling, which is alternately connected by a sleeve in the middle, a diaphragm set on both sides, and a half coupling through a reamed bolt. The diaphragm set is Made of multiple very thin stainless steel plates, the diaphragm assembly can be divided into two types: connecting rod type and integral type according to different structures.

The JMIJ type diaphragm coupling compensates for the relative displacement of the two shafts connected by the elastic deformation of the diaphragms on both sides. The main features are no lubrication, compact structure, long service life, no rotation gap, and no influence of temperature and oil pollution. It has the characteristics of acid and alkali resistance, and is suitable for shafting transmission in high temperature, high speed, and corrosive medium working conditions.

JMIJ type diaphragm coupling is the key transmission device of connecting shaft. The correct installation method can make the intermediate shaft diaphragm coupling have stable performance and long life.The specific installation method is as follows: the bolt is the intermediate shaftDiaphragm couplingOne of the important components.Whether it is installed correctly or not will directly affect the performance life of the diaphragm coupling, otherwise it will cause waste of manpower and accessories.Therefore, the correct installation of the bolt direction is a key part, and you must remember not to install it backwards or drop any small parts, including spring washers.Only in this way can the bolt assembly exert its excellent performance without damaging other parts of the coupling.

JMIJ type diaphragm coupling installation instructions

1. Before installation, first check whether the prime mover and the working machine are concentric, whether there are wrapping paper and scratches on the surfaces of the two shafts, whether there are debris in the inner holes of the two half couplings of the coupling, and whether there are any edges of the inner holes. If there are bruises, the shaft and half coupling should be cleaned up, and the bruises should be treated with a fine file.Then check whether the inner hole diameter and length of the two half couplings are consistent with the diameter and shaft elongation of the prime mover and working machine.In general selection, it is better to make the length of the prime mover and the working machine end half-coupling less than 10-30mm of shaft elongation.

2. In order to facilitate the installation, it is better to put the two half couplings in the 120-150 incubator or oil tank for preheating, so that the inner hole size increases and it is easy to install.After installation, the shaft head should not protrude from the end face of the half coupling, and it is better to be flush.Detect the distance between the two halves of the coupling: take the average of the readings of 3--4 points measured along the two inner sides of the flange of the half coupling, and the sum of the measured dimensions of the extension and the two diaphragm sets. The error is controlled within the range of 0-0.4mm.

3.找正：用百分表检测两半联轴节法兰盘端面和外圆跳动，当法兰盘外圆小于250mm时跳动值应不大于0.05mm；当法兰盘外圆大于250mm时，跳动值应不大于0.08。

Basic parameters and main dimensions of JMIJ diaphragm coupling mm (JB/T 9147-1999)